US1516756A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Producing aromatic substances from petroleum
Assignee: Ellis Foster Co
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Filing: 1922-05-12
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Granted: 1924-11-25
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Expires: 1942-05-12
Abstract
No abstract record available.
Inventors
- 👤 Harry M Weber
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 15:00
CPC Classifications
B; B65; B65B; B65B25/00; B65B25/06; C; C07; C07B; C07B35/00; C07B35/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1927-11-25 | 1928-05-26 | 1928-11-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1931-11-25 | 1932-05-26 | 1932-11-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1935-11-25 | 1936-05-26 | 1936-11-25 | $7700.00 | Window Closed / Lapsed |